On space

"I have always tried to overcome the limitations of my condition and lead as full a life as possible. I have traveled the world, from the Antarctic to zero gravity. Perhaps one day I will go into space." -- to the New York Times in 2011.

"I have already completed a zero gravity flight which allowed me to float weightless, but my ultimate ambition is to fly into space." -- to ITV in 2017.

On God

"God may exist, but science can explain the universe without the need for a creator." -- in a 2010 CNN interview.

"The scientific account is complete. Theology is unnecessary." -- in a 2010 CNN interview.

On women

"My [physician assistant] reminds me that although I have a PhD in physics, women should remain a mystery." -- in his first Reddit AMA. (His PA is a woman, by the way.)